Radetzky-class battleships participated in the bombardment of the Italian city of Ancona. Following these operations, the three battleships' contributions to the war effort became minimal. They remained in port until the end of the war. Following Austria-Hungary's defeat in World War I, all three battleships were handed over to Italy and later broken up for scrap between 1920 and 1926. Tegetthoff class The Tegetthoff-class battleships were the only group of dreadnought battleships to be constructed by Austria-Hungary. The Austro-Hungarian Navy needed to update its fleet following the construction of . After the announcement in 1908 of the start of construction for the first dreadnought of the Regia Marina (the Italian Navy), the , the Austro-Hungarian Navy formally ordered the construction of a series of four dreadnought battleships. Unlike the previous classes of the Austro-Hungarian Navy, the Tegetthoff class was made up of four battleships instead of three. They were the , , , and . The first three battleships were constructed in the Stabilimento Tecnico Triestino shipyard in Trieste, while the fourth battleship, Szent István was constructed at the Danubius shipyard at Fiume. All of the battleships were constructed between 1910 and 1915. Two of the Tegetthoff-class battleships were commissioned less than two years prior the beginning of World War I, while Prinz Eugen was commissioned the same month as the assassination of Archduke Franz Ferdinand. The last battleship of the class, Szent István, was commissioned during the war in November 1915. Prior to the war, the battleships in commission were assigned to the 1st Battleship Division of the 1st Battle Squadron of the Austro-Hungarian Navy. During the war, the ships had limited service due to the Otranto Barrage, which prevented the battleships from leaving the Adriatic Sea. As a result, they rarely left Pola. However, three of the battleships participated in the flight of the German battlecruiser SMS Goeben and light cruiser SMS Breslau in 1914, and in the bombardment of the Italian city of Ancona in May 1915. (Szent István was still under construction.) Following these operations and the completion of the Szent István, the Tegetthoff-class battleships remained in port for the remainder of the war. The final operation for the Tegetthoff-class ships was an attempt to break through the Otranto Barrage in June 1918. During the journey to the strait of Otranto, the battleship Szent István was torpedoed and sunk on 10 June 1918, resulting in the